Rotatable handle attachable to an object having a longitudinal extent

ABSTRACT

A rotatable handle assembly attachable to a generally tubular object has an auxiliary handle circumscribing a hand passageway configured to receive a user&#39;s hand therein. A clutch biased in an engaged position operatively couples a shank extending from the upper end of a hook attachable to the object to a collar integrally formed as a portion of the auxiliary handle and releasably prevents the shank from rotating relative to the collar. A ratchet on the upper end of the hook cooperates with a pawl on a pivot arm which is attached to the lower end of the hook and which extends toward the ratchet and is rotatable about a transverse axis perpendicular to the longitudinal axis of the shank to adjust the size of the object passageway receiving and releasably retaining the object therein.

BACKGROUND OF THE INVENTION

The present invention relates generally to a handle removably attachable to an object and, more particularly, to an object having a generally tubular cross-sectional shape, such as a portion of a handle of a children's car seat or other seat or carrier or alternatively to exercise equipment, such as a portion of a horizontal gymnastic exercise bar.

Conventional car or other seats or carriers are well known for safely and conveniently transporting a relatively young or small child, such as a baby or infant. As a child grows, it can be awkward and/or difficult for an adult or other individual to lift or move such a car seat or other seat or carrier by a handle thereof.

For example, the orientation of the handle often requires that the palm of the individual carrying the seat must be in a frontward position (toward the direction of movement) or rearward position (opposite the direction of movement). However, it is not always ergonomically natural for many individuals to carry a relatively heavy weight at their side with their palm in either of these positions. Instead, it is often more natural for an individual's palm to be positioned inwardly (i.e., approximately ninety degrees from the direction of movement). Given the length of a typical car seat, it can be difficult to carry the car seat with the individual's palm positioned inwardly because doing so often results in the car seat hitting the individual (such as in the leg).

U.S. Pat. No. 8,671,523 B1 A (Day) discloses a carrier removably attachable to at least a portion of a handle of an object. The carrier includes a first housing having a handle and a base. The handle of the first housing is rotatable with respect to the base of the first housing about a first axis. A second housing is pivotally attached to the base of the first housing by a hinge and is rotatable about a second axis which extends generally perpendicularly to the first axis. The carrier is pivotable between an open configuration in which at least a portion of the base of the first housing is at least partially separated from the second housing to receive at least a portion of a handle of an object therein and a closed configuration in which at least a portion of the base of the first housing and the second housing combine to surround the handle of the object therebetween. A fastener positioned on one of the base of the first housing and the second housing generally opposite the hinge permits the base of the first housing to be locked to the second housing in the closed configuration. The load applied by the handle of the object is uniformly distributed between the hinge and the fastener.

U.S. Patent Application Publication No. 2011/0173778 A1 (Wales) discloses an auxiliary handle for attachment to the shaft on tools or implements. The auxiliary handle has a handle portion, a base portion, and an attachment portion. The handle portion has a body and a grip. The body is rotatably and slidably disposed in the base portion and may be adjusted into a variety of positions and/or orientations. The base portion is rotatably connected to the attachment portion which has a first jaw and a second jaw rotatably connected to the first jaw by an adjustable hinge having an adjuster which releasably tightens the inner surface of first jaw and the second jaw around the shaft of a tool. The space between the inner surfaces of the jaws forms a passageway for receiving the shaft of the tool. Similar to the Day carrier, the load applied by the shaft of the tool to the Wales auxiliary handle is uniformly distributed between the two jaws and transmitted through the hinge to the auxiliary handle.

Accordingly, there is a need in the art for a rotary handle releasably attachable to an object which does not subject a hinge of the handle to the load applied by an object to which the rotary handle is attached.

BRIEF SUMMARY OF THE INVENTION

Briefly stated, one embodiment of the present invention is directed to a rotatable handle assembly attachable to an object and graspable by a user's hand. The rotatable handle assembly has an auxiliary handle circumscribing a hand passageway configured to receive the user's hand therein. A collar is integrally formed as a portion of the auxiliary handle. A hook having an upper end and a lower end is attachable to the object. A shank is integrally formed with and extending from the upper end of the hook. The shank has a longitudinal axis. A clutch operatively couples the shank to the collar. The shank is moveable relative to the collar only in translation along the longitudinal axis when the clutch is in an engaged position. The shank is movable relative to the collar in rotation about the longitudinal axis when the clutch is in a disengaged position. The clutch is biased in the engaged position. A ratchet is on the upper end of the hook. A pivot arm is attached to the lower end of the hook. The pivot arm extends toward the ratchet and is rotatable about a transverse axis perpendicular to the longitudinal axis of the shank. A pawl is attached to the pivot arm for rotation therewith. The pawl is slideable in translation relative to the pivot arm between a first pawl position in which a free end of the pawl engages the ratchet preventing rotation of the pivot arm and a second pawl position in which the free end of the pawl is disengaged from the ratchet. The pawl is biased in the first pawl position.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS

The foregoing summary, as well as the following detailed description of preferred embodiments of the invention, will be better understood when read in conjunction with the appended drawings. For the purpose of illustrating the invention, the drawings show embodiments which are presently preferred. It should be understood, however, that the invention is not limited to the precise arrangements and instrumentalities shown.

In the drawings:

FIG. 1 is a front perspective elevation view of a first preferred embodiment of the rotatable handle in accordance with the present invention;

FIG. 2 is an exploded front perspective elevation view for the rotatable handle of FIG. 1;

FIG. 3 is an enlarged front cross sectional view, partially in perspective, of the clutch portion of the rotatable handle of FIG. 1; and

FIG. 4 is a front elevation view in cross section of the rotatable handle of FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in detail to embodiments of the invention, examples of which are illustrated in the accompanying drawings. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

As used in the description of the invention and the appended claims, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. The words “and/or” as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items. The words “comprises” and/or “comprising,” when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

The words “right,” “left,” “lower” and “upper” designate directions in the drawings to which reference is made. The words “inwardly” and “outwardly” refer to directions toward and away from, respectively, the geometric center of the rotatable handle, and designated parts thereof. The terminology includes the words noted above, derivatives thereof and words of similar import.

Although the words first, second, etc., are used herein to describe various elements, these elements should not be limited by these words. These words are only used to distinguish one element from another. For example, a first end be could be termed a second end, and, similarly, a second end could be termed a first end, without departing from the scope of the present invention.

As used herein, the words “if” may be construed to mean “when” or “upon” or “in response to determining” or “in response to detecting,” depending on the context. Similarly, the phrase “if it is determined” or “if [a stated condition or event] is detected” may be construed to mean “upon determining” or “in response to determining” or “upon detecting [the stated condition or event]” or “in response to detecting [the stated condition or event],” depending on the context.

The following description is directed towards various embodiments of a rotatable handle in accordance with the present invention.

Referring to the drawings in detail, where like numerals indicate like elements throughout, there is shown in FIGS. 1-4 a first preferred embodiment of the rotatable handle, generally designated 10, and hereinafter referred to as the “rotatable handle” 10 in accordance with the present invention. The rotatable handle 10 is attachable to an object and graspable by a user's hand. Preferably the object is a tubular object having a generally circular cross section and a longitudinal extent.

The rotatable handle 10 has an auxiliary handle 12 coupled to a hook 14 removably attachable to the object (not shown). The auxiliary handle 12 circumscribes a hand passageway 16 configured to receive a user's hand therein. A collar 18 is integrally formed as a portion of the auxiliary handle 12. The collar 18 has a collar bore 20 therethrough. The radially inwardly facing surface 22 of the collar bore 20 has a longitudinally extending keyway 24 therein. In some embodiments, a compliant ergonomic grip 26 is preferably, but not necessarily, attached to an inner portion of the auxiliary handle 12 opposite the collar 18.

The hook 14 has an upper end 28 and a lower end 30 and defines an object passageway 32 adjustably sized to receive the object. The inwardly facing (or concave) surface 34 of the hook 14 has an arcuate portion 36 and a straight portion 38. In some embodiments, one or more compliant hook pads 40 are attached to the inwardly facing surface 34 of the hook 14. A shank 42 is integrally formed with and extends from the upper end 28 of the hook 14. The shank 42 has a longitudinal axis A_(L) A flange 44 is integrally formed with the free end 46 of the shank 42 and has a downwardly facing flange surface 48 extending radially outwardly from the shank 42. The flange surface 48 has a plurality of flange teeth 50 extending therefrom.

A clutch 52 operatively couples the shank 44 to the collar portion 18 of the handle 12. The shank 42 is moveable only in translation along the longitudinal axis A₁ relative to the collar 18 when the clutch 52 is in an engaged position. The shank 42 is movable in rotation about the longitudinal axis A₁ relative to the collar 18 when the clutch 52 is in a disengaged position. The clutch 52 is biased in the engaged position.

The clutch 52 comprises a clutch ring 54 disposed in the collar 18. Preferably, the clutch ring 54 is formed as two semi-cylindrical pieces that snap together. However, in some embodiments, the clutch ring 54 may be a one-piece molded construction. The clutch ring 54 has a clutch-ring bore 56 within which a portion of the shank 42 is disposed. The clutch ring 54 has a key 58 extending radially outwardly into the keyway 24 of the collar 18 preventing rotation of the clutch ring 54 relative to the collar 18.

The clutch ring 54 has an annular clutch-ring surface 60 opposing and frictionally engaging the flange surface 48 when the clutch 52 is in the engaged position. In some embodiments, the clutch-ring surface 60 preferably, but not necessarily, has a plurality of clutch-ring teeth 62 extending therefrom and engaged with the plurality of flange teeth 62 when the clutch 52 is in the engaged position. In some embodiments, a wave washer 64 biases the clutch 52 in the engaged position.

A ratchet 66 is integrally formed on the arcuate, inwardly facing surface portion 34 of the upper end 28 of the hook 14. The ratchet 66 has a plurality of ratchet teeth 68.

A pivot arm 70 is attached to the lower end 30 of the hook 14. The pivot arm 70 extends toward the ratchet 66 and is rotatable about a transverse axis A₂ perpendicular to the longitudinal axis A₁ of the shank 14 from a first position P₁ allowing access to the object passageway 32 to one of a plurality of second positions P₂ adjusting the size of the object passageway 32 to secure the object therein. In some embodiments, one or more compliant pivot arm pads 72 are attached to the inner surface 74 of the pivot arm 70.

A pawl 76 is attached to the pivot arm 70 for rotation therewith. The pawl 76 is slideable in translation relative to the pivot arm 70 between a first pawl position P₃ in which a free end 78 of the pawl 76 engages the ratchet 66 preventing rotation of the pivot arm 70 and a second pawl position P₄ in which the free end 78 of the pawl 76 is disengaged from the ratchet 66. The pawl 76 is biased in the first pawl position P3, by a biasing member 82 which preferably is a coil spring. At least one pawl tooth 80 on the free end 78 of the pawl 76 engages one ratchet tooth of the plurality of ratchet teeth 68 preventing rotation of the pivot arm 70 when the pawl 76 is in the first pawl position P₃ and the pivot arm 70 is in the second pivot arm position P₂.

The foregoing components (or piece parts) comprising the rotatable handle 10 may be fabricated by molding, casting, or machining. With the exception of the biasing elements which are preferably spring steel, the fabrication material of choice is a polymeric material, although, in some instances, a metal such as aluminum may be used. The auxiliary handle 12, hook 14, and pivot arm 72 are each preferably formed as two complementary pieces that are joined together by an adhesive, threaded fasteners or a snap fit manner well known in the art.

The use of the rotatable handle 10 is hereafter disclosed with respect to an object that is a carrier, such as a baby carrier or basket, having a carrier handle which is at least partially arcuate and/or in the shape of a generally inverted “U” and which has a generally circular cross-sectional shape. Referring to FIG. 4, prior to use, the rotatable handle 10 is in the configuration shown therein. The pivot arm 70 is in the second pivot arm position P₂ forming with the radially inwardly facing (or concave) surface of the hook 14 the closed object passageway 32 and the pawl 76 is in the first pawl position P₃ engaging the ratchet 66.

As a first step in attaching the rotatable handle 10 to the handle of the carrier, the user moves the pawl 76 in translation from the first pawl position P₃ to the second pawl position P₄, disengaging the ratchet 66 and allowing the pivot arm 70 to move in rotation. As a second step, the user rotates the pivot arm 70 from the second pivot arm position P₂ to the first pivot arm position P₁, providing access to the object passageway 32. During the second step, once the pivot arm 70 clears the ratchet 66, the pawl 76 may return to the first pawl position P₃, under the force of the pawl biasing member 82. As a third step, the carrier handle is placed in the object passageway 32. As a fourth step, the pivot arm 70 is rotated to the second pivot arm position P₂ through an angular displacement sufficient to place the pivot arm pad 72 in compression against the carrier handle and to have the pawl 76 re-engage the ratchet 66 releasably retaining the carrier handle in the object passageway 32.

If the orientation of the carrier handle relative to the auxiliary handle 12 causes the user discomfort when the user grasps and lifts the auxiliary handle 12 with the weight of the carrier and its contents, if any, supported by the hook 14, the clutch 52 may be disengaged to allow rotation of the shank 42 relative to the handle 12 until the palm of the user's hand grasping the auxiliary handle 12 is in an ergonomically natural position. The clutch 52 may be disengaged allowing the desired rotation by pressing the auxiliary handle 12 downwardly toward the carrier handle, until the teeth 50 on the flange 44 of the shank 42 no longer engage the teeth 62 on the clutch ring 54.

In an alternative use, for example, if the position of an athlete's palm grasping a horizontal gymnastic exercise bar is ergonomically uncomfortable, the hook 14 of the rotational handle 10 may be attached to the horizontal bar in a manner similar to the steps described above for use with a carrier such that the auxiliary handle 12 suspended downwardly from the bar. The auxiliary handle 12 may be rotated to an ergonomically comfortable position by disengaging the clutch 52 as discussed above.

The foregoing detailed description of the invention has been disclosed with reference to specific embodiments. However, the disclosure is not intended to be exhaustive or to limit the invention to the precise forms disclosed. Those skilled in the art will appreciate that changes could be made to the embodiments described above without departing from the broad inventive concept thereof. Therefore, the disclosure is intended to cover modifications within the spirit and scope of the present invention as defined by the appended claims. 

We claim:
 1. A rotatable handle assembly attachable to an object and graspable by a user's hand, the rotatable handle assembly comprising: an auxiliary handle circumscribing a hand passageway configured to receive the user's hand therein; a collar integrally formed as a portion of the auxiliary handle; a hook having an upper end and a lower end, the hook attachable to the object; a shank integrally formed with and extending from the upper end of the hook, the shank having a longitudinal axis; a clutch operatively coupling the shank to the collar, the shank moveable relative to the collar only in translation along the longitudinal axis when the clutch is in an engaged position; the shank movable relative to the collar in rotation about the longitudinal axis when the clutch is in a disengaged position, the clutch biased in the engaged position; and a ratchet on the upper end of the hook; a pivot arm attached to the lower end of the hook, the pivot arm extending toward the ratchet and rotatable about a transverse axis perpendicular to the longitudinal axis of the shank; and a pawl attached to the pivot arm for rotation therewith, the pawl slideable in translation relative to the pivot arm between a first pawl position in which a free end of the pawl engages the ratchet preventing rotation of the pivot arm and a second pawl position in which the free end of the pawl is disengaged from the ratchet, the pawl biased in the first pawl position.
 2. The rotatable handle assembly of claim 1, wherein the clutch comprises a clutch ring disposed in the collar, the clutch ring having a clutch-ring bore within which a portion of the shank is disposed.
 3. The rotatable handle assembly of claim 2, wherein the collar has a collar bore therethrough, the collar bore having a longitudinally extending keyway therein and the clutch ring has a key extending radially outwardly into the keyway preventing rotation of the clutch ring relative to the collar.
 4. The rotatable handle assembly of claim 2, wherein a flange is integrally formed with the free end of the shank and has a flange surface extending radially outwardly from the shank and the clutch ring has an annular clutch-ring surface opposing and frictionally engaging the flange surface when the clutch is in the engaged position.
 5. The rotatable handle assembly of claim 1, wherein: the collar has a collar bore therethrough, the collar bore having a longitudinally extending keyway therein; the clutch ring is disposed in the collar and has a key extending radially outwardly into the keyway of the collar bore preventing rotation of the clutch ring relative to the collar, an annular clutch-ring surface and a clutch-ring bore within which a portion of the shank is disposed, and a flange is integrally formed with the free end of the shank and has a flange surface extending radially outwardly from the shank, the flange surface opposing and frictionally engaging the annular clutch-ring surface when the clutch is in the engaged position.
 6. The rotatable handle assembly of claim 5, wherein the flange surface has a plurality of flange teeth extending therefrom and the clutch-ring surface has a plurality of clutch-ring teeth extending therefrom and engaged with the plurality of flange teeth when the clutch is in the engaged position.
 7. The rotatable handle assembly of claim 1, wherein a wave washer biases the clutch in the engaged position.
 8. The rotatable handle assembly of claim 1, wherein the cross sectional area of an object passageway defined by the hook and the pivot arm is adjustable.
 9. The rotatable handle assembly of claim 1, wherein the inner surface of the hook has an arcuate portion and a straight portion.
 10. The rotatable handle assembly of claim 1, wherein the upper end of the hook has an arcuate, internal surface portion and the ratchet is integrally formed thereon by a plurality of ratchet teeth.
 11. The rotatable handle assembly of claim 10, wherein at least one pawl tooth on a free end of the pawl engages one ratchet tooth of the plurality of ratchet teeth preventing rotation of the pivot arm.
 12. The rotatable handle assembly of claim 1, wherein one or more compliant pads is attached to the inner surface of the hook or pivot arm.
 13. The rotatable handle assembly of claim 1, wherein a compliant ergonomic grip is attached to an inner portion of the handle opposite the collar. 